Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a2fd9203727f44…

MALICIOUS

PDF

86.9 KB Created: 2021-07-08 01:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c36bafeadd3078f8856e254c8235acdc SHA-1: ad68a828f06b4b478569f87900f552dd2abb83d0 SHA-256: 03a2fd9203727f44d1be4b0e9721f322b34025421cea440a315dc4e02c18901e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=bruce+willis+survive+the+night PDF link annotation
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c7e8de499---94310429296.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/96knc32o7e2t4krfd2vpcigchr/bosalabulidemozosivusevum.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/avde1mee03soudi14agtjoufa4/nigigojapoxaxozozepapoji.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/16702404784.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/sedejidokofodex.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/h2ur1vnd4e3kujlauv0iu0m5c3/domujepetevekotuwipi.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e1cd8d77f---31071463879.pdfIn PDF document text
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/tidaragis.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210624220014.pdfIn PDF document text
    • http://porterbrothersltd.com/app/webroot/uploads/dudugatulepiti.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/36111579028.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/72472444963.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d4b0c14ae---58664843189.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/zopogegolitudazenuna.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f737b90fe1---jakusosiw.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9442a552f---xafisubefifurigi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/37276851318.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/2bf8e12c4f7c5ddb43f80ca56341d7c8/59100938916.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2cd83d901---gubirilexosinoxexis.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/botemasetirikuwotavedo.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/312ba2b60ca6dd1d2dd616fa9e058f17/malakunolibaz.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/e731e8ba2158bf2b9542d6aa1d057ee0/29866458332.pdfIn PDF document text
    • http://signexpowholesale.com/project-new/christianbook/upload_images/file/63889260846.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 10532 bytes
SHA-256: 082d0198bc5fb0997e9ee3d6fe4f752c3db7b60a812d05e87c33ba55f8d4f83e
font_01_sfnt_off0001062a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062A 19060 bytes
SHA-256: 0ca6861694ff1c9e025d5fc582521a44abd07d6c92b51c9f35f63644c025fa21
font_02_sfnt_off00013674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.